Implementing Lazy Loading in React with Suspense

A quick guide on implementing lazy loading in React applications using Suspense. Boost web app performance and enhance user experience.

( tag: react, tag: lazy loading, tag: suspense )

In React, lazy loading with Suspense can be a game changer for web app performance. It allows you to defer loading components until they’re needed, enhancing user experience.

To start, import Suspense and lazy from React:

import React, { Suspense, lazy } from 'react';

Declare your lazily loaded component:

const LazyComponent = lazy(() => import('./LazyComponent'));

Wrap the LazyComponent with Suspense and provide a fallback UI:

function App() {
  return (
    <div>
      <Suspense fallback={<div>Loading...</div>}>
        <LazyComponent />
      </Suspense>
    </div>
  );
}

export default App;

In this example, the LazyComponent will only be loaded when it’s rendered. Until then, the fallback UI (“Loading…”) will be displayed.

Remember to place the Suspense component high enough in your component tree to capture all components you want to lazily load.